25271257 has 4 divisors (see below), whose sum is σ = 27568656. Its totient is φ = 22973860.

The previous prime is 25271249. The next prime is 25271269. The reversal of 25271257 is 75217252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25271257 - 2³ = 25271249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25271237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1148683 + ... + 1148704.

It is an arithmetic number, because the mean of its divisors is an integer number (6892164).

Almost surely, 2^25271257 is an apocalyptic number.

It is an amenable number.

25271257 is a deficient number, since it is larger than the sum of its proper divisors (2297399).

25271257 is a wasteful number, since it uses less digits than its factorization.

25271257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2297398.

The product of its digits is 9800, while the sum is 31.

The square root of 25271257 is about 5027.0525161371. The cubic root of 25271257 is about 293.4555188577.

The spelling of 25271257 in words is "twenty-five million, two hundred seventy-one thousand, two hundred fifty-seven".